X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmovepick.h;h=8028d487f3f5803418f22f12b4b5dbf116cc947f;hp=73fbbddb3475f8b7bfaf52753c840167b34d7078;hb=b3525fa9ea88e230a38d72351826cbc16c282938;hpb=647402ff7910ff26f5d6b967812d85f5f4259fee

diff --git a/src/movepick.h b/src/movepick.h
index 73fbbddb..8028d487 100644
--- a/src/movepick.h
+++ b/src/movepick.h
@@ -46,11 +46,7 @@ struct Stats {
   T* operator[](Piece pc) { return table[pc]; }
   void clear() { std::memset(table, 0, sizeof(table)); }
 
-  void update(Piece pc, Square to, Move m) {
-
-    if (m != table[pc][to])
-        table[pc][to] = m;
-  }
+  void update(Piece pc, Square to, Move m) { table[pc][to] = m; }
 
   void update(Piece pc, Square to, Value v) {
 
@@ -70,6 +66,26 @@ typedef Stats<Value, false> HistoryStats;
 typedef Stats<Value,  true> CounterMoveStats;
 typedef Stats<CounterMoveStats> CounterMoveHistoryStats;
 
+struct FromToStats {
+
+    Value get(Color c, Move m) const { return table[c][from_sq(m)][to_sq(m)]; }
+    void clear() { std::memset(table, 0, sizeof(table)); }
+
+    void update(Color c, Move m, Value v)
+    {
+        if (abs(int(v)) >= 324)
+            return;
+
+        Square f = from_sq(m);
+        Square t = to_sq(m);
+
+        table[c][f][t] -= table[c][f][t] * abs(int(v)) / 324;
+        table[c][f][t] += int(v) * 32;
+    }
+
+private:
+    Value table[COLOR_NB][SQUARE_NB][SQUARE_NB];
+};
 
 /// MovePicker class is used to pick one pseudo legal move at a time from the
 /// current position. The most important method is next_move(), which returns a
@@ -83,10 +99,9 @@ public:
   MovePicker(const MovePicker&) = delete;
   MovePicker& operator=(const MovePicker&) = delete;
 
-  MovePicker(const Position&, Move, const HistoryStats&, Value);
-  MovePicker(const Position&, Move, Depth, const HistoryStats&, Square);
-  MovePicker(const Position&, Move, Depth, const HistoryStats&,
-             const CounterMoveStats&, const CounterMoveStats&, Move, Search::Stack*);
+  MovePicker(const Position&, Move, Value);
+  MovePicker(const Position&, Move, Depth, Square);
+  MovePicker(const Position&, Move, Depth, Search::Stack*);
 
   Move next_move();
 
@@ -97,10 +112,7 @@ private:
   ExtMove* end() { return endMoves; }
 
   const Position& pos;
-  const HistoryStats& history;
-  const CounterMoveStats* counterMoveHistory;
-  const CounterMoveStats* followupMoveHistory;
-  Search::Stack* ss;
+  const Search::Stack* ss;
   Move countermove;
   Depth depth;
   Move ttMove;
@@ -108,7 +120,7 @@ private:
   Square recaptureSquare;
   Value threshold;
   int stage;
-  ExtMove *endQuiets, *endBadCaptures = moves + MAX_MOVES - 1;
+  ExtMove* endBadCaptures = moves + MAX_MOVES - 1;
   ExtMove moves[MAX_MOVES], *cur = moves, *endMoves = moves;
 };